* read_tsc causing high cpu usage
@ 2020-07-07 14:22 Tim Stowell
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From: Tim Stowell @ 2020-07-07 14:22 UTC (permalink / raw)
To: kvm
Hi,
I've noticed when running "perf kvm --host top (pid of qemu-kvm)" that
"read_tsc" is using on average 20% of the CPU when a FreeBSD guest is
idle. I'm somewhat new to kvm, is that normal? I've tried various
timer options with libvirt, but read_tsc is almost always using most
of the cpu. I'm using an AMD EPYC 7302P processor if that is helpful,
thanks.
-Tim
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